NikolaosZachariasMDFACOG(He/Him)

Birth Defect & Fetal Treatment, General Obstetrics, Maternal & Fetal Medicine/High Risk

Director of Medical Education - Obstetrix Maternal-Fetal Medicine (MFM) Specialists of Houston, Pediatrix/MEDNAX; MFM Director - Saint Joseph Women's Center, Steward Health; Clinical Associate Professor of Obstetrics/MFM, University of Houston Tilman J. Fertitta Family College of Medicine, Subspecialty Faculty Educator - MFM, Houston Methodist Hospital Obstetrics & Gynecology Residency Program

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Office
2100 Travis St
#1250
Houston, TX 77002
Phone+1 346-348-1980

Fax+1 281-763-7717

Summary

Nikolaos Zacharias, MD, FACOG, is a native of Greece; he earned his medical diploma with excellence from the National & Kapodistrian University of Athens, Greece (1995) reciting the Hippocratic Oath as a top graduate in his class. Dr. Zacharias received numerous scholarships for undergraduate and postgraduate education (1989-2002). He trained in Obstetrics & Gynecology at Baylor College of Medicine, (1998-2002), elected chief resident in 2001. He received the CREOG Academic Achievement Award four consecutive years (1999-2002) for scoring at the top 3% of his U.S. peers.

His passion for prenatal sonography and profound interest in pregnancy complications led him to a fellowship in Maternal-Fetal Medicine at the University of Texas Medical Branch, in Galveston, Texas (2002-2005), where he received the UTMB Hospital Academic Fellowship Award. Dr. Zacharias returned to Baylor as assistant professor of OB/GYN, in the Maternal Fetal Medicine Division (2005-2013). He served as medical director of the Harris Health System (HHS) Prenatal Ultrasound Screening Program (2005-2012) and as founding medical director of the Ben Taub Maternal Fetal Medicine Prenatal Ultrasound Unit (2008-2012). Dr. Zacharias was a founding member of the Texas Children’s Fetal Center 2006-2013, an attending physician and teaching faculty at Ben Taub General (2005-2013) and Texas Children’s Hospital (2008-2013). He is board-certified in OB/GYN (2008) and Maternal Fetal Medicine (2011). Dr. Zacharias received Baylor's student faculty teaching award (2011) and was elected to America's Top Obstetricians & Gynecologists (2012). He is a fellow of ACOG (2010) and regular member of SMFM (2012). He served as the medical director of the AIUM-accredited antenatal testing center and assistant professor of OB/GYN-MFM at LBJ Hospital and McGovern Medical School at UTHEALTH (2014-2019), supervising >80,000 prenatal ultrasounds and receiving annual Dean's teaching awards. He joined Obstetrix MFM Specialists, 2019.

Education & Training

University of Texas Medical Branch HospitalsFellowship, Maternal-Fetal Medicine, 2002 - 2005
University of Texas Medical Branch Graduate School of Biomedical SciencesMMS, thesis pending, 2002 - 2005
Baylor College of MedicineChief Residency, Obstetrics and Gynecology, 2001 - 2002
Baylor College of MedicineResidency, Obstetrics and Gynecology, 1998 - 2002
Baylor College of MedicineInternship, Obstetrics and Gynecology, 1998 - 1999
University of AthensClass of 1995, MD, Magna Cum Laude - Excellent
Sorbonne UniversitySorbonne II, French Literature, 1986 - 1988
University of CambridgeProficiency in English Language, Proficiency in English Language, 1984 - 1986

Certifications & Licensure

TX State Medical License 2005 - 2025
American Board of Obstetrics and Gynecology Obstetrics & Gynecology
American Board of Obstetrics and Gynecology Maternal-Fetal Medicine

Awards, Honors, & Recognition

Dean’s Faculty Teaching Award McGovern Medical School at UTHEALTH, 2015-2017
Regular Member Society for Maternal-Fetal Medicine, 2012
Elected to America’s Top Obstetricians & Gynecologists Consumers' Research Council of America, 2012
Madison Who’s Who of Executives and Professionals Madison Who’s Who, 2010
Voted for the Student Faculty Teaching Award Baylor College of Medicine, 2010
Marquis Who’s Who in Medicine and Healthcare and in Science and Engineering Marquis Who’s Who, 2005
Academic Fellowship Award University of Texas Medical Branch Hospital, 2002
Scored at the top 5% of all US Ob/Gyn residents Annual CREOG Examinations, 1999
Awarded Honorary Plaques for Outstanding Academic Performance Baylor College of Medicine department of Obstetrics and Gynecology, 1999
Scored highest in the examinations for the Kontoleon Scholarship National and Kapodistrian University of Athens, 1997
Scored at the top 5% on Steps 1 to 3 United States Medical Licensing Examination, 1996
Graduated “Ptycheion Iatrikes”, [i.e. Medical Diploma], with the degree of “Excellent”; First in Class National and Kapodistrian University of Athens School of Health Sciences, 1995
Scored highest in the examinations in the Papadakis Scholarship National and Kapodistrian University of Athens, 1990
Ranked among the top 3% of class National and Kapodistrian University of Athens School of Medicine, 1990
Graduated First in Class Papagos Lyceum, 1989
Ranked 13th among more than 10,000 applicants in the Pan-Hellenic examinations for admission National and Kapodistrian University of Athens School of Medicine, 1989
Award from the Rotary Club of East Attica Rotary Club of East Attica, 1989
Honorary Scholarship National Scholarship Foundation, 1989
Full Tuition Scholarship for the Masters in Medical Science (MMSc) degree UTMB department of Obstetrics and Gynecology
Physician Recognition Award American Medical Association
Fellow (FACOG) American Congress of Obstetricians and Gynecologists
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Publications & Presentations

PubMed

15 citations
Perinatal survival of a fetus with intestinal volvulus and intussusception: a case report and review of the literature.
Esohe F. Ohuoba, Gary Fruhman, Oluyinka O. Olutoye, Nikolaos Zacharias
AJP Reports. 2013-07-11
274 citations
Maternal morbidity in patients with morbidly adherent placenta treated with and without a standardized multidisciplinary approach.
Alireza A. Shamshirsaz, Karin A. Fox, Bahram Salmanian, Concepcion R. Diaz-Arrastia, Wesley Lee
American Journal of Obstetrics and Gynecology. 2015-02-01
68 citations
Prospective trial on obstructive sleep apnea in pregnancy and fetal heart rate monitoring.
Sofia A. Olivarez, Bani Maheshwari, Meghan McCarthy, Nikolaos Zacharias, Ignatia B. Van den Veyver
American Journal of Obstetrics and Gynecology. 2008-12-01

Journal Articles

First Neonatal Demise with Travel-Associated Zika Virus Infection in the United States of America.
Zacharias N, Whitty J, Noblin S, Tsakiri S, Garcia J, Covinsky M, Bhattacharjee M, Saulino D, Tatevian N, Blackwell S., American Journal of Perinatology Reports, 4/13/2017
Maternal morbidity in patients with morbidly adherent placenta treated with and without a standardized multidisciplinary approach.
Shamshirsaz AA, Fox KA, Salmanian B, Diaz-Arrastia CR, Lee W, Baker BW, Ballas J, Chen Q, Van Veen TR, Javadian P, Sangi-Haghpeykar H, Zacharias N, Welty S, Cassady CI..., American Journal of Obstetrics and Gynecology, 2/1/2015
Prospective trial on obstructive sleep apnea in pregnancy and fetal heart rate monitoring
Olivarez S, Maheshwari B, McCarthy M, Zacharias NM, Van den Veyver I, Casturi L, Sangi-Haghpeykar H, Aagaard-Tillery K, American Journal of Obstetrics and Gynecology, 8/1/2010
Right-lower quadrant pain and suspected appendicitis in Pregnant Women: Evaluation with MR Imaging-Initial Experience
Oto, Ernst, Shah, Koroglu, Chaljub, Gei, Saade, Zacharias NM, Radiology, 1/1/2005
High false-positive rate of human immunodeficiency virus rapid serum screening in a predominantly Hispanic population
Zacharias NM, Athanassaki ID, Sangi-Haghpeykar H, Gardner MO, J Perinatol, 1/1/2004
Microcephaly: an epidemiological analysis
Zacharias NM, Am J Obstet Gynecol, 1/1/2003
Predictability of intrapartum and neonatal outcomes with the amniotic fluid volume distribution: A reassessment using the amniotic fluid index, single deepest pocket, ...
Zacharias NM, Am J Obstet Gynecol, 1/1/2003
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Books/Book Chapters

Shnider & Levinson’s Anesthesia for Obstetrics
Chapter: Anesthesia for Vaginal Birth after Cesarean Delivery
Zacharias NM, LaToya Mason CEditors: Suresh M.Lippincott Williams & WilkinsEdition 5th,2012
Obstetric Imaging
Chapter: DiGeorge, Wolf-Hirschhorn and Cri-du-chat Syndromes
Zacharias NM, Van den Veyver IEditors: Copel J.McGraw-Hill2012

Abstracts/Posters

Maternal-fetal and gestational characteristics and microsomal aromatase activity in human placentas
Zacharias NM, Society of Maternal-Fetal Medicine Annual (The pregnancy TM) Meeting, Dallas, TX, 2/1/2012
Creating a customized Birth Weight Standard for Harris County’s Hispanic Population
Amini S, Francis A, Sangi-Haghpeykar H, Gardosi J, Zacharias NM, Society of Maternal-Fetal Medicine Annual (The pregnancy TM) Meeting, San Francisco, CA, 2/1/2011
Prevalence and clinical significance of Polyhydramnios during Screening Prenatal Sonography in a modern Hispanic cohort
Kim J, Sangi-Haghpeykar H, Zacharias NM, Society of Maternal-Fetal Medicine Annual (The pregnancy TM) Meeting, San Francisco, CA, 2/1/2011
Predicting the Delivery Date at Term in a Hispanic Population: the Case for the Fetal Transcerebellar Diameter
Labanca F, Sangi-Haghpeykar H, Zacharias NM, American Congress/College of Obstetricians and Gynecologists Annual Clinical Meeting (ACM), San Francisco, CA, 5/1/2010
Spontaneous Preterm Delivery and Transabdominally Assessed Cervical Length during Screening Prenatal Sonography: A Case-control Study
Doan QT, Sangi-Haghpeykar H, Zacharias NM, American Congress/College of Obstetricians and Gynecologists Annual Clinical Meeting (ACM), San Francisco, CA, 5/1/2010
Prospective Trial on Obstructive Sleep Apnea in Pregnancy and Fetal Heart Monitoring
Zacharias NM, Society of Maternal-Fetal Medicine Annual (The pregnancy TM) Meeting, San Diego, CA, 1/1/2009
Maternal-Fetal Characteristics and Fetal Femur Diaphysis Length in a Predominantly Hispanic Population
Zacharias NM, Agboola, and Sangi-Haghpeykar H, Society of Maternal-Fetal Medicine Annual (The pregnancy TM) Meeting, San Diego, CA, 1/1/2009
Maternal-Fetal characteristics and aromatase activity in term human placental microsomes
Zacharias NM, National Women’s Health Week - Mini Medical School Poster Session, Galveston, TX, 5/1/2004
Balloon-tip catheter occlusion of the hypogastric arteries in the surgical management of placenta accreta
Zacharias NM, National Women’s Health Week - Mini Medical School Poster Session, Galveston, TX, 5/1/2004
Terbutaline in the management of intrapartum fetal bradycardia
Zacharias NM, Pacheco, Vidal, Saade, Hankins, Annual Clinical Meeting of the Society of Maternal-Fetal Medicine, New Orleans, LA, 1/1/2004
MRI in the evaluation of acute abdomino-pelvic pain during pregnancy: initial experience
Zacharias NM, Oto, Saade, Gei, Annual Clinical Meeting of the Society of Maternal-Fetal Medicine, New Orleans, LA, 1/1/2004
Balloon-tipped catheters in the management of placenta accreta: a case series
Zacharias NM, Hankins, Saade, Vadhera, Gei and VanHook, Annual Clinical Meeting of the Society of Maternal-Fetal Medicine, New Orleans, LA, 1/1/2004
Aspirin for the prevention of pre-eclampsia: a systematic review
Zacharias NM, Saade, Bukowski and Sibai, Annual Clinical Meeting of the Society of Maternal-Fetal Medicine, New Orleans, LA, 1/1/2004
Maternal-Fetal Characteristics and Term Human Placental Microsome Aromatase Activity
Zacharias NM, Society of Gynecological Investigation Annual Meeting, Houston, TX, 1/1/2004
Aspirin for the prevention of fetal growth restriction (FGR): a systematic review
Zacharias NM, Bukowski, Suarez, Saade, Sibai, 10th Annual South-Central Conference on Perinatal Research, Austin, TX, 10/1/2003
High false-positive rate of HIV ELISAs in a predominantly Hispanic prenatal population
Zacharias NM, Gardner MO, Sangi-Haghpeykar H, 10th Annual South-Central Conference on Perinatal Research, Austin, TX, 10/1/2003
Aspirin for the prevention of fetal growth restriction (FGR): a systematic review
Zacharias NM, Bukowski, Suarez, Saade, Sibai, Annual Clinical Meeting of the Society for Maternal-Fetal Medicine, San Francisco, CA, 1/1/2003
High false-positive rate of HIV ELISAs in a predominantly Hispanic prenatal population
Zacharias NM, Gardner, Sangi-Haghpeykar, Annual Clinical Meeting of the Society for Maternal-Fetal Medicine, San Francisco, CA, 1/1/2003
Predictability of intrapartum and neonatal outcomes with the amniotic fluid volume distribution: A reassessment using the amniotic fluid index, single deepest pocket, ...
Zacharias NM, Annual Meeting of the Central Association Of Obstetricians and Gynecologists, Las Vegas, NV, 10/1/2002
Microcephaly: an epidemiological analysis
Zacharias NM, Annual Meeting of the Central Association Of Obstetricians and Gynecologists, Las Vegas, NV, 10/1/2002
High false-positive rate of Human Immunodeficiency Virus screening in a predominantly Hispanic prenatal population
Zacharias NM, Annual Texas Association of Obstetricians and Gynecologists (TAOG) meeting, Houston, TX, 4/1/2002
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Lectures

Fetal anomaly case presentations
Texas Medical Center, Houston, TX - 3/1/2013
Prenatal imaging of fetal syndromes
Baylor College of Medicine, Houston TX - 2/1/2013
Fetal growth restriction
Baylor College of Medicine, Houston TX - 8/1/2012
Modern Prenatal Ultrasound
2/1/2012
Evidence-based Modern Prenatal Ultrasound
10/1/2010
Prenatal Ultrasound: an evidence-based approach
Houston TX - 10/1/2009
Prenatal sonography in modern prenatal care
Tulsa, OK - 9/1/2009
Evidence-based Prenatal Sonography
Tulsa, OK - 3/1/2009
Hypertensive disorders of pregnancy
Houston, TX - 3/1/2007
Tuberous Sclerosis in perinatology
Houston TX - 10/1/2006
High false-positive rate of Human Immunodeficiency Virus screening in a predominantly Hispanic prenatal population
Houston, TX - 4/1/2003
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Other

Perinatal mortality
Zacharias N
http://www.uptodate.com/contents/perinatal-mortality
UpToDate, Wolters Kluwer Health - 2013-03-12

Committees

Member, Quality Assurance Committee - Ben Taub General Hospital 2011 - 2013
Member, Radiation Safety Committee - Baylor College of Medicine 2008 - 2013
Member, Texas Children's Fetal Center 2006 - 2013

Professional Memberships

American Institute of Ultrasound in Medicine - AIUM
Member
American College of Obstetricians and Gynecologists
Fellow
Society for Maternal-Fetal Medicine - SMFM
Member

Other Languages

Spanish, French, Greek